Welding bellows-pipe



A PEARSALL. MACHINE FOR WELDING BELLOWS PIPES.

Patented Aug. 31, 1858.

A. PEARSALL, OF NASHVILLE, TENNESSEE.

WELDING BELLOWS-PIPE.

Specification of Letters Patent No. 21,359, dated August 31, 18-58.

To all whom it may concern:

Be it known that I, A. PEARSALL, of Nash ville, in the county ofDavidson and State of Tennessee, have invented a new and ImprovedMachine for elding Bellows Pipes or Nozzles; and I do hereby declarethat the following is a full, clear, and exact description of the same,reference being had to the annexed drawings, making a part of thisspecification, in which Figure 1, is a side view of my invention. Fig.2, is a front sectional view of ditto taken in the line 00, w, ofFig. 1. Fig. 3, is a perspective view of a nozzle before being welded.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention consists in the employment or use of an inclined mandrel,clamps, and welding roller arranged as hereinafter fully shown anddescribed, whereby the seams or joints of bellows pipes or nozzles maybe closed and welded in a very expeditious and perfect manner.

To enable those skilled in the art to fully understand and construct myinvention I will proceed to describe it.

A, represents the base of the machine which may be of cast metal and B,is an upright post attached thereto at one end.

G, is a mandrel of taper or conical form and attached to the post B, soas to project over the base A, in an inclined position as shown clearlyin Fig. 1, the form and dimensions of the mandrel corresponding to theform and dimensions of the pipes or nozzles to be welded.

D, D, are two uprights attached to the base A. Between the upper ends ofthe uprights D, D, the shanks a, a, of two clamps E, E, are placed, saidshanks being-fitted loosely on a rod 6, and crossing each other so thatas the lower ends of the shanks are drawn toward each other the clampsE, E, will have a corresponding movement.

The clamps E, E, may be described as being longitudinal halves of ahollow cone or a form approximating thereto so as to conform to theshape of the mandrel C, see Fig. 2, a clamp being at each side of themandrel.

The lower ends of the shanks a, a, are attached by a wire or chain c, toa treadle G, connected by a fulcrum pin (Z, to the post B. This treadlepasses through slots in the uprights D, D. The lower end of each shanka, a, has a spring a, bearing against it, said springs having a tendencyto keep the lower ends of the shanks thrown outward from each other.

To the upper end of post B, two inclined bars H, H, are attached. Thesebars are slotted longitudinally and horizontally to receive the axis orshaft f, of a roller I, the periphery of which is made slightly concavecorresponding to the periphery of the mandrel C. The slotted bars H, H,serve as guides for the roller 1.

J, J, are two spring catches which are attached to the post B, and whichretain the roller 1, at the upper parts of the bars H, by catching overthe axis f, see Fig. 1, a spring catch J, being at each end of the axisf. The spring catches J, are connected by a wire or chain 9, with thetreadle G.

The operation is as follows: The pipes or nozzles K, are formed ofsheetmetal and bent in proper form, one edge overlapping the other asshown clearly in Fig. 3. The pipes or nozzles are properly heated at theedges and placed one at a time on the mandrel C. The foot of theoperator is then placed on the end of treadle G, and said treadledepressed. By this operation the clamps E, E, are pressed against thepipe or nozzle which is thereby retained on the mandrel and the springcatches J, J, are, by the same movement of the treadle, depressed andthe roller I, allowed to descend down and over the edges of the pipe ornozzle closing the seam or joint and by its own gravity perfectlywelding the same, the upper edges of the clamps being sufficiently farapart to expose fully the seam or joint. The roller I, is then movedback and retained by the spring catches J, J, the clamps E, E, beingdistended by the springs e, c, which in connection with the springcatches J, J, elevate the treadle G. Another pipe or nozzle is thenheated and placed on the mandrel C, and the operation repeated.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent, is,

The inclined mandrel C, clamps E, E, and roller 1, combined and arrangedfor joint operation substantially as and for the purpose herein setforth.

A. PEARSALL.

Witnesses:

W. D. MoBEToN, T. O. LAMER.

